C 2500 Truck 2WD V8-5.7L VIN R (1997)
Intake Air Temperature (IAT) Sensor: Testing and Inspection
The scan tool displays temperature of the air entering the engine, which should read close to ambient air temperature when engine is cold. The
temperature should rise as underhood temperature increases. If the engine has not been run for several hours (overnight) the IAT sensor temperature and
engine coolant temperature should read close to each other. If the VCM detects a malfunction in the IAT sensor circuit, the following DTCs will set:
^
DTC P0112 circuit low.
^
DTC P0113 circuit high.
^
DTC P1111 circuit intermittent high.
^
DTC P1112 circuit intermittent low.
Refer to Diagnostic Trouble Code Tables.
